AvaliaÇÃO da produÇÃo de hidrogÊnio a partir da codigestÃo anaerÓbia de resÍduos sÓlidos orgÂnicos e glicerol residual da produÇÃo de biodiesel

Abstract

The anaerobic co-digestion of solid organic waste with residual glycerol from biodiesel production (1% v v-1) for hydrogen production was investigated by means of the Biochemical Hydrogen Potential (BHP). The specifc hydrogen production from co-digestion with and without glycerol corresponded to 140 mL H2 g VS-1 and 87,3 mL H2 g VS-1 removed, respectively, while the maximum specifc H2 production rate was found to be 14.26 e 8.57 mL H2 g VS h-1, respectively. Co-digestion of solid organic waste with glycerol enhanced hydrogen production and reduced the fermentation lag phase in around 4 hours. The dominant metabolite product of the anaerobic fermentation was butyric acid. The results revealed that co-digestion of organic water and glycerol is promising and can potentially be used to maximize energy production while contributing to the management and treatment of these wastes.